Open Circuit
An open circuit is a break in a circuit, so no current can flow.
What is Open Circuit?
Broken wires, loose connectors and failed components are common causes. The component simply stops working. Fault codes often say circuit open or low. Wiring that passes through door hinges, boot lids and seat rails often breaks from repeated movement. Back-probing connectors while the circuit is live is a gentle way to check. Corrosion inside a connector can act like a partial open circuit.
How it works
The break interrupts the path of the current.
Why it matters for your car
Intermittent opens are hard to find; wiggle tests help. Check connectors for pushed-out pins.
Other terms
- 12-volt Socket (Accessory Socket)
- Axial Flux Motor
- Blind Spot Monitoring
- Brake Caliper
- Charging Modes (Mode 2, 3, 4)
- Crankshaft Position Sensor
- Engine Displacement (Engine Capacity)
- Exhaust Gas Temperature Sensor
- Forced DPF Regeneration (Service Regeneration)
- Gear Oil (Transmission Oil)
- Gear Shift Cable (Linkage)
- GPS Navigation System
- Intake Air Temperature Sensor
- Mechanic’s Stethoscope
- Oil Pressure Warning Light
- Power Steering Pump
- Scuttle Panel (Cowl)
- Speed Limiter
- Steering Angle Sensor
- Tyre Puncture Repair (Plug And Patch)